G35 Coupe V35 2003 - 07 Discussion about the 1st Generation V35 G35 Coupe

ECM Relay Replacement (urgent)

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Old 04-16-2016, 06:53 PM
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ECM Relay Replacement (urgent)

So I suspect my ECM relay went bad. Rebuilt the motor over the winter, fired her up and it idled fine, did a few restarts while checking items and now it wont start. No power to the coils at all. Checked the ECM fuse and thats fine, only other item in the way is the relay. I have done some digging and Nissan says you have to replace the entire IDPM, but I have seen some talk about guys swapping just the relay from other vehicle models. Does anyone have experience with this? I have to get this running by Thursday to make my tune date, otherwise I cant get tuned until mid July.
 
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Old 12-05-2018, 03:44 PM
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I am having the same EXACT issue, I was hoping to find some info on this, any luck??
 
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Old 12-05-2018, 04:46 PM
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Originally Posted by 2one8 View Post
So I suspect my ECM relay went bad. Rebuilt the motor over the winter, fired her up and it idled fine, did a few restarts while checking items and now it wont start. No power to the coils at all. Checked the ECM fuse and thats fine, only other item in the way is the relay. I have done some digging and Nissan says you have to replace the entire IDPM, but I have seen some talk about guys swapping just the relay from other vehicle models. Does anyone have experience with this? I have to get this running by Thursday to make my tune date, otherwise I cant get tuned until mid July.
Come back in July and let us know how you made out.
The FSM has some good info in the EC section.
Use your multimeter to check all the harness connections.

Telcoman
 
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Old 12-05-2018, 07:15 PM
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There is an ignition fuse that might be bad. Four things you need for an engine to run. Spark, fuel, air, and compression. I'd start with spark...
 
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Old 12-05-2018, 08:24 PM
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G35 sedan w/ too much money in mods
Originally Posted by telcoman View Post
Come back in July and let us know how you made out.
The FSM has some good info in the EC section.
Use your multimeter to check all the harness connections.

Telcoman
That's a 2.5 year old thread you responded to but thanks for playing.
 
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Old 12-06-2018, 05:34 AM
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Originally Posted by Blue Dream View Post
That's a 2.5 year old thread you responded to but thanks for playing.
I went back to look at the OP's post and you are correct but others responded & I never noticed the date on the OP's post.
But my point to the OP and others having the same problem is go carefully read the FSM prior to coming here to ask why their vehicle won't start with no spark.

Telcoman
 
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